Mold-engraving machine



April 24, 1928.

A. J. FLEITER ET AL MOLD ENGRAVING MACHINE Filed March 30, 1926 7 sheets-sheet 1 .llllllllllld llll Iuhzllll@ A. J. FLEITER ET AL MOLD ENGRAVING MACHINE Filed March 50. 1926 7 sheets-Sheet 2 ATTORNEY.

April 24, 1928. 1,667,687

A. J. FLEITER ET AL MOLD ENGRAVING MACHINE Filed Marqh 50, 1926 v sheets-sheet 5 INVENTRS. ANDREW J. /25/751?. @sopa/f5 /V/LLEA? By ff? Q ATTORNEY.

April 24, 1928. 1,667,687

A. J. FLEITER ET AL MOLD ENGRAVING MACHINE Filed March 30, 1926 7 Sheefcs-Sheet 4 IN VEN TOR.)`

NDREW f f2s/rsf? @Eames /V/um.

ATTORNEY.

April 24, -192 s. 1,667,687

A. J. FLEITER ET AL MOLD ENGRAVING MACHINE Filed March 50. 1926 7 Sheets-Sheet 5 rromsx April 24, 1928. 1,667,687

A. J. FLEITER ET AL MLD ENGRAVING MACHINE Filed March 50, 1926 7 Sheets-Sheet 6 f, 2 /50 20 MM C?? /5/ l ATTORNEY.

April 24, 1928.

1,667,687 A. J. FLEITER ET A1.

MOLD ENGRAVING MACHINE Filed March so, 192e 'r sheets-sheet '7 i.' liiimif INVENTORS. NDAEH f E/E/a @moms/. /V/LLE/e,

ATORNEY.

` invention only.

Patented Apr. 24,' 1928.

` unirse STA ANDREW J. rnni'rnn AND THEODORE THE AKRON: srANnARnMOLD COMPANY, or AKRON, OHIO.

TEsPATENTLOFFICE.

A. MILLER, OFAKRON, OHIO, AssIGNoRs Toy` OHIO, A CORPORATION or MOLD-ENGRAVING MACHINE.

Application; led March 30, 1926. Serial No. 98,477.

to the engraving of pneumatic tire molds,

it will be appreciated that the invention may be employed in the engraving of molds 'for other articles of a similar nature. i

The Objects of the invention and the ad* vantages to be gained will be apparent to those skilled in this art. mary objects an automatic' mold which, Whenset in" operation, Will carry Y Figure 4*;

One of the pri- Ot the invention is to provide engraving machine forward the engraving of the non-skidpatterns Without further attentionon the gpart of the operator.' The pattern is controlledA by a series of cams, or similar devices, which' can be changed to suit the pattern desired to be cut in the mold. Each stage of the operation of the machine cuts a. single unit or area Ot the pattern in the mold, and

after the completion of the unit of the pattern the mold is advanced another step and a fresh pattern area is cut.y v

y rlhe machine provides a system of gearing and drive mechanism this result and, in addition, accurate spacing mechanism for accomplishing embodies an units of the pattern are reproduced' at the required lintervals about the Vmold.

The

gained "from the numerous advantages andy benetits invention Will be appree ciated by a complete study of the invention as described herein.`

The machine, being entirely automatic, is cheaper to operate and gives better and more rapid production than prior machines.

he torni of machine illustrated and def vclutch which serves to scribed herein is one embodiment of the It Will ber understood that after the principles oi the invention have been made clear to experienced and skilled persons in this art, it is other forms of machine possible to design for accomplishing in anL d in the claims yappended hereto.

ln the drawings in which a preferred form the invention is shown:

so that the Figure 1 is a side yelevation of the complete machine shOWing a pneumatic tire vmold in sect'on, mounted upon the rotating table or mold carriage;

'Figure 2 is a sectional View through the center of the table for supporting the mold Figure 5 is a plan view Oi?V the cutting head;

Figure 6 is a vertical section throughthe head on the line 6`6 of Figure 4;

Figure is a section on the line 7-47 ofy Figure 8 is a section on the line 8T8 of Figure 4;

Figure 9 is plan of a typical mold. de-` sign Which this machine isv adapted tocut; Figure 10 is a cam laid out for theI purpose of cutting the pattern of Figure 9.;

Figure 11 is a plan view and driveconnectionsfor imparting .the reuired movements to 'thetool head and to the mold table; y

Figure 12 is a vertical section on the line 12-12 of Figure 11;

Figure 13 is a vertical section On the linev Y13--13 of Figure 11;y

Figure 14 is a vertical section on the line 14C-14 of Figure 11; y'Figure 15 is a shaft for the turntable, the section being taken along the line 15--15 of Figure 11;

V.Figure 16'is a side view of the drive gears Jfor the turntable drive shaft;

Figure 17 is a section on the line 17-17 of Figure 15; l

Figures 18,' 19 and 20 are details Of the intermittently connect the cam shaft with the drive shaft, Figure 2OV being a section on the line 20-20 of Figure 19; and Q Y Figure 21 is a detail of thecam Afor reciprocating the head.

Briefly summarized, the Operation of 'the machine is as follows: i Thev machine is designed especially for thec'utting of the non-skid `patterns inthe tread of aftire mold, these partsbeing cut into the mold and being the reverse' lof the pattern on the completed tire;

of the gearing f section along the vdrive The tire mold is shown at 1., the tread thereoi, or that portlon to be cut away on this machin-e, is indicated at 2, the bottom` of the recesses or cavities to be cut away by this machine being on an arc, the center oit which is at the center of curvature ot the treadv portion ol the tire. The cutting tool is indicated by the numeral 7.

The mold is carried upon a rotary turntable 8 which is j 'en two distinct periods of movement about its aiis, the first of which is a period of oscillation during which the tool is performing the cutting operation, the combined oscillation of the mold and movement of the tool radially of thc mold causing` the tool to travel over a path or series of strokes covering the complete area which is to be cut out in a single unit of the pattern. The second movement oi` the turntable accomplishes the spacing oi' the pattern units about the mold which taires place while the tool is inactive. During` the second movement, the tool is clear oit the mold.

rlhe machine is mounted upon a bed plate 10 upon the upper sur'l'ace of which at one side of the machine are located parallel 'guideways llupon which is slidably mounted the mold carriage 12. Centrally located on the unoer side of the mold carriage is a rack ,13 which is engaged by a `gear 14 mounted upon a transverse shaft 15 which' is rotated in bearings in the bed plate. The outer end of the sha'it 15 has secured to it by set screw 14;a a rocking arm 16, to the lower end of which is adjustably connected a long linlr17, the adjustment being obtained by'a plurality of holes 18 for the connection of the link, the holes being spaced difierent distances from the shaft. The other end of the link 17 is connected to a reciprocating slide 19 mounted on a horizontal guideway 20vat the side ot' the bed plate. r[he 'face ot the Slidell) carries a roller 21 which travels in a track 22 on the inner tace of a. cam 23. The cam 23 is carried upon acontinuously rotating shaft 24 (Figure 14). It will be observed that this cam is o configuration to shilt the mold carriage toward and from the center of the machine at regular intervals, the forward or outward position of the mold carriage being during the cutting operation and the `inward position being during the period in which the mold is being moved to a new cutting position. In this manner the tool may be freed `l'rom the mold so that the mold and tool can be shiit'ted relatively to one another so as to advance to the next area without cutting into the metal.

It the pattern on the mold is such that the mold may be advanced without first shifting it with respect to the tool, the set screw 14a is loosened and the shifting mechanism operates idly.

The turntable 8, upon which the mold is clamped, is mounted upon the carriage 12 by a pivot pin 5, the table resting upon friction reducing` bearings and being rotated upon the axis of the mold bymeans of a large bevel gear 25 on the under side of the turntable. The gear 25 is in mesh with a bevel pinion 26 Yformed upon an elongated sleeve 6 feathered upon the end of a horizontal shaft 27 shaft is slidably received in a bearing 28 which is supported by arms 29 secured to the underside ot the sliding carriage 12. rThe bearing 28 holds the pinion 26 in mesh with the Ifear between the shoulder of the pinion and collars 30 on the end of the sleeve G. lil/leal' upon the feather is taken up by a rotatable collar 31 fastened to 'the end of the bevel pinion by bolts slots 33 in the collar and into the pinion 26. The shat't 27 is permitted to move in'and out with the movement of the mold carriage. The shatt 27 imparts the two movements to the mold which were vdescribed above, a series ozt oscillations while the mold is at the outer extremity of its movement and while the cutting operation is going on', and the other a movement of advancementto-a new cutting 4position which takes mold is retracted or while the tool is inactive. The mechanism for rotating the shaft to obtain tl ese movements at the proper time will be described later.

From one side or' the bed plate is erected passingv through (Figu`re`2). The end' of the v place while the which is formed the vertical dovetail way 3G on which is engaged the vertically adj ust-V able head 37, the position ot adjustment being controlled by a vertical screw shaft 38. A crank Ll1 is received on the upper end oi the screw shaft 38. ,y e

The head 37 extendsovcr the mold and serves as a support ttor the milling tool 7. rllhe tool is secured in the bit 45 at the lower end oit an elongated spindle 46, tho upper end ot the spindle being provided with a pulley 47 which Ais given a constant, rapid rotation `by any suitable l'lexible driving means. The spindle is mounted in a sleeve 48, which latter is adjustably mounted vin housing` 4-9 by nieans of a two-part clamping nut 50 adapted to be drawn together to clamp the sleeve bymeans ot' a bolt 51. The

sleeve and its tool are adjusted to the proper f the lower part of the head 37. A thrust bearing 63 is located between the sector and 53 Vcut into the side ot nected at its rear end A roller 84 on the slide the head, and the bushing 62 is held in position by a nut 64. Pressure lubricating means for the ypinV of a well-known` type is shown at 65.r j

To the rear of the sector plate is bolted a quadrant 66, the outer edge of which is Aformed with a rib 67 received'and guided by an arcshaped guide rail68 which is secured to the head by a number of bolts 69.

To the youter periphery of the sector plate is secured a rack 70, which meshes with a horizontally reciprocating rack 71v secure to the outer end of a sliding bar 72. kThe, rack is guided by a roller 100 receivedrin a slotV 101 in the rack, the roller being supported on a pin 102 in a bracket 103 carried on the head 37. The bar 72 is guided ina plate 73 mounted on thehead 37 andis conto a plate 74which is guided in horizontal guideways 7 5 secured to a bracket 76. The bracket 76 is carried onthe rear of the vertically adjustable head 37 and passes over a vertical shaft 90 which is driven intermittently'by mecha-Y nism tok be described. The upper end of the shaft 90 is provided with a keyway 8O and over this shaft is slidably fitted and Vfeathered a horizontal cam 82, the under face of which is provided with a cam track 83. plate 74 is received in this cam. Y

The rotation of the shaft and itsfcarn controls the reciprocation or radial movement of the tool withrespect to the mold.

f Thecam is operative only while the cutting operation is going on and is inoperative while the spacing of the mold takesplace, the shaft being connected or disconnected from its driving means, to be described, at the proper intervals. During the cutting operations the mold is oscillated aboutvits axis and the combined radial movement of the to'ol and oscillation of the mold will generate any desired pattern in the mold.

There are, the1efore,'two factors which govern the pattern to beA cut in the mold. The iirst factor is the radial movement Aof the tool, which, in this machine, is a movement of oscillation, although a straightline movement may be adopted. This 'fac-tor is controlled by the cam 82 through the mechanism which has been described in connection with the head. trolled through the rotation 'ofthe bevel. pinion 26 mechanismfwhich will be described. Any path may be given to thetool y by requisite `changes in thercontrolling mechanism and any pattern maybe reproduced. The pattern shown^in Figure 9 vhalsbeen selected lfor the ypurposes of illustration herein, the path of the toolbeing illustrated in'that'figure. In this figure the topof the mold, or the parting at the center of the tread, is on the left side,

it being observed that the pattern which has The diagonal' cut The second factor isr `Conline which is situated j been selected for Villustration is provided with al centralgroove 95, which is cut in the mold on the boringmill before the operations herein described take place. The presence of this groove in the mold makes unnecessary the shifting ofthe mold relativeto the tool prior to vthe. spacing operation, `so it may be Vassumed that the set screw 14" is loosened; I

It is apparent'th'at if the tool is held stationary and the lmold is moved about its d vaxis, a straight circumferential line will be cut in the mold; If the mold is held stationary straight radial line will be formed. If the mold and tool are both moved, diagonal or curved lines of any patternwill be formed.

Taking the pattern of Figure 9 and tracing the radial periods lof movement or rest of the tool by the cam of Figure 21, the following will be observed. u Assuming that the cutting tool is at the starting and stopping point Y, it will be observed vthat the cam roller 84^is 'shown at the corresponding point on the cam, 'which is at the outer limit of the cam'so that the tool is at the position shown in Figures 1 and 4. Y

The'firstcut is along the line Y-A and is a diagonal cut so that the mold vis moving downwardly, as viewed in Figure 9,'wh1le the tool is vmoved 'toward the axis of the mold by the cam surface'Y-A on cam 82. i A-B is then made by an outward movement ofthe tool, controlled by ythe, cam sur-face.-A-B whilethe mold continues its downward movement'. The cirand the tool moved radially aA cumferential line B-C is then lgenerated while the tool is stationary and the mold continues its downward movement. :The mold is then stationary while the radial line C-.-D is cut by a radial moven'i'ent of the tool.v The tool 'is then held stationary while the mold .is moved downwa'rdlyftoA obtain the 'cut D-QE. Combined movement of the mold and tool generate` the next cut E-F and combinedrmovement ofthe tool and reverse movement of the mold generate the line F-Gh VA stationary tool and an upwardly moving mold obtain the line G-H- The lines H-I'and .lf-J .are then cut inthe same manner. i

The Acuts so far described have removed a path about theflargerecess of the pattern, leaving an island of metal inthe center which has to be out ava-y. The cuts .ll- K, K--L, L-'M, M-N, N14-O and O--P move this island. The first cut has been in the nature of a roughening-out cut and itis desirable atv times toy take a iinishing'cut around the figure, closely following the path of` the lirst cut. After 'the movement the tool ismoved along the lines Q-R, R-S, S-T, T-U, U-V and VenW, and then out of the recess along the lines VV-X and X-Y to the starting When the tool reaches its starting the shaft ceases to rotate and the ing mechanism comes into play,

point. point, spaemoving the tool on to the next starting point Z.

'-' 13, will shift the mold to f tion of the mold during cutting and the feeding movement between cuts, or the spac ing, will now be described.

The power for the machine is derived from a pulley which is located at the side of the machine (Figure 11) and which carries a pinion 136 meshing with a pinion 137 which is secured upon a worm drive shaft 138 passing through the bed plate and supported at its inner end in a bracket 189.

"f The worm 140 on the shaft 138 meghes with a worm gear 141 which is secured tothe lower end of a vertical shaft 142, which is rotated continuously during the operation of the machine, being supported in a bear- "f ing 143 on a plate 144 which also supports the various driving elements for the mold.

The lower end of the shaft 142 carries a bevel pinion 145 which meshes with a bevel pinion 146 on the cam shaft 24, and drives the latter.

Shaft 142 is in direct alignment with the shaft 90, the latter having a reduced end 147 which has a step bearing in the upper end of the shaft 142.

Near its upper end the shaft 142 has a fixed gear 150 (Figures 18, 19 and 20), the upper end of which is cupped to receive a plate 151 which is provided with a radial dove-tailed guideway 152 extending from the shaft 142 to the edge of the plate 151. A sliding clutchpin 153 is movable in the l guideway 152, being yieldingly forced outward by a spring 154 received at its inner end over a screw-threaded pin 155 on the shaft l142. A :linger 156 on the clutch pin engages a notch 157 located on theinside of a disk 158 which is keyed to the lower end of the shaft 90. rlhe tail 159 of the clutch pin projects outwardly beyond. the disk and gear. l/Vhen, therefore, the clutch pin projects outwardly, the shaft 142 and 90 are locked together and rotate simultaneously through the clutch which has just been described. When the clutch pin is forced inwardly, however, nected and the finger 156 rides around in retracted position on the inner circular wall 160 formed in the lower face of the disk 158. The shaft 90 is thus stationary until the pin is again brought in alignment with the two shafts are discon` the notch 157. vBy the mechanism which In order to secure the intermittentk operation of the clutch of Figures 18 and 19, the tail` of the clutch is pressed inwardly by means of a dog which is'secured to the upper face of a gear 166 which meshes with the gear 150. The gear 166 constitutes a timing mechanism for the cam shaft 90 and has twice the number of teeth as the gear 150 so that it follows thatrthe clutch hasfa complete active and a complete inactive rotation for each rotation of the gear 166, the dog 165 always meetingv the tail of the clutch pin after a complete rotation of the gear 166 and the period of rotation of the gear 166 is equally divided between the period of cutting and spacing of the mold.

The gear. 166 is rotated 'upon'y a vertical pin 167, the lower end of which is received in the plate 144 and the upper end in a bracket 168 ysecured to the bed plate and overhanging the gear. In addition to controlling` the reciprocation of the cutting head, the gear 166 controls the spacing of the mold lduring the non-cutting operation by a hearteshaped cam 169 with which cooperates a clutch control cam 170.

The oscillation of the mold during the cutting operation is controlled by a cam which is fastened to thelower end ofthe shaft 90 and rotates only when vthe shaft rotates and then only while the .tool is lreciprocated over the mold by its cam 82.k The detail of the cam 175 is shown in Figure 10 in which the various surfaces are marked to correspond with the movements ofthe cutting tool as illustrated in Figure 9. Thus the surfaces Y-A, A-B, B-C, ete. give the required oscillation or dwell in the mold operating mechanism to enable the tool to describe the required path in the unit of tread design.

Against the surface of thecam 175 bears a roller 176 which is carried on a plate 177 adjusted by bolt and slot connections 178 upon a slide 17 9 which reciproeates upon a dovetailed guideway 180 formed on the upper surface of a bridge piece 181 which is supported upon pillars 182 from the plate 144. v

To the side of the slide 179 isattached an angular rack 183 having teeth on its underside which engage avpinion 184 freely rotatable on the shaft 27 and located between a collar 185 and Leones? Y through clutch mechanism to be described.

heshaft 27 extends through themachine and is supported through the medium of the sleeves about rthe shaftl in a bearing 187 The sleeve 186 immediately surrounds the shaft 27 and is formed at itsV inner end with' a flange 188 which is secured to the face of the gear 184. shaft to a point outside the bearing 187 at which point the sleeve has keyed to it yan arm 189 having a hub about whichis rotatably mounted a short arm 190, the two arms being adjusted by means of arc-shaped slots 192 in the arm 190 and vbolts 193 passing through the slots into the arm 189. On one side of the arm is carried an adjustable weight 194 which, acting through the sleeve 186, mantains the roller 176 in contact with the cam 175.

To the endof the shaft 27 is keyed a gear 195 which meshes with an idler gear 196 w-hiclris carried in a slot 19,7 on the adjustable arm 190. The gear 196 meshes with a pinion 198 on the end of a stub shaft 199 adj ustably mounted in a slot` 200 formed in the rocking arm 189 (Figure 16) .K The shaft 199 carries at its inner end a large gear 201 which meshes with a smaller gear 202 whichI is keyed to a sleeve 203, received within the bearing 187 (Figure 15). The gearing202 to 195 constitutes anadjustable 'speed drive which can be altered as desired, they adjust# able arm 190 permitting the mounting of varying gears in the train to obtain the re quired spacing of the pattern about the mold.

. he flange 188 is provided with a notch 204 .andthe gear 184 214, and in these notches is adapted to enter a pin 205 projecting sleeve 203 by elongated keys 207.v `The sleeve 206 is shifted longitudinally upon the shaft by means of a collar 208 which is engaged bythe Spanner arms 209 ofa rocking lever 210 which is pivotedon the shaft 142. The lever 210 extends toward the tail of the lever is forced against the ledge of the cam by a spring 211. vThe arrangement of this cam is such that when the clutch between the shafts 90 and 142 is engaged, the pin 205 is engaged in. the notches 204 and 214 so that the shaft 27 is oscillated by the cam 175 only during the reciprocation of the tool carrier. During the oscillation of the shaft 27 -the adjustable differentialv gearing carried by the oscillating arms 189-190 isV locked by the clutch The turntable is moved by the cam 169 attached to the gear 166, the cam track being engaged by a roller 215 which is carried Whenever the cam 26 on the. sha-ft 27 1t extends along the with an aligned notch from the inner face. of a sleevel 206, which is featheredupon the`r the cam 170 and` upon arack 216 movable in the upper Surface of the plate 144 and meshing with a gear 217 securedto a stub shaft 218 which is mounted in a housing219. The shaft 21,8'l carriesa gear 220v which meshes .with a pili-r ion 221 cna second stub shaft'222 also mounted in the housingv219. The shaft 222 carries a. gear 223v which (meshes I.with a gear v224 loosely mounted on the sleeve 203. .The

gear 224 is slidable upon thesleeve 203, being provided witha groove 225 Which'isengaged by pins 226 on the end of thesliding sleeve 206 opposite the pins 205. The gear 224 is yieldinglyl held at its outward limit of Y movement by a coil spring 227 (Figure 15) so that it can yield slightly when it operates as a clutch betweenthe gearing driven by the cam 169 and the lshaft 27. For this purpose the side ofthe gear 224 is arranged f with clutch teeth which are adapted toengage corresponding teeth onv the face of a disk'228 which is ykeyed to the sleeve 203.

It willbe observed that when. the cam `175 is not rotated, at whichjtimethe clutch pin 205 is disengaged, the sleeve 203 is free to rotate, and it will be rotated when the clutch i 224-228 is engaged, which position of they parts is illustrated in Figure 11. Themo'vef ment of the rack 216 to space the mold table is ,then transmitted through the gearing 217 to 224 to the sleeve 203 and thence through the gear 202 and the reduction gearing on the arm189. to the shaft 27. The feeding or spacing of theturntable takes place, inl alterf nation with its oscillation, the shifting of the sleeve 206` connecting ory disconnecting the drive from the rack 216. rTlieoscillation of the turntable is stopped and started by the `operati-on vof the clutch pin 153, which takes` place at the proper' time with' theopveration' of the other parts ofthe machine.

lon

It isbelieved that the operation of the mal chinev will have been made clear by the de scription which has been given. The machine, havingbeen set in motion, cuts a unit of the patternv and spaces'each unit properly withontany` other attention on the part of the operator than to see that everything is working properly. The advantagesfin labor saving and the precision ofthe. work are'the principal advantages to be obtained..k vW ith appropriate changes in the variousA cams and vance .or spacing movement ,takes place, a

l slightv dwell being allowable at this point the operation of the machine. f

.It will be apparent that the design of the machine shown herein willk adapt itself to lll' ladjustment of the partait is possible to obmultiple work, that is, to the connection of a series of machines to a common driving shaft so that the mold cutting may proceed on several molds at the same time.

It will be appreciated that lthe detailed construction of the machine is not necessary to the invention which may be embodied in other forms than that shown.

l/Vhat is claimed is:

l. In a machine for automatically cutting repetitions of a pattern in a tire mold, a turntable for 'supporting the mold, a cutter over the turntable, intermittently operative means to Areciprocate the cutter and to oscillate the mold simultaneously, turntable ro tatin'g mechanism adapted to move the mold for the nextpattern, and mechanism to cause the .last named mechanism to operate during the pauses in the operation of the first named means.

2. In 'a machine for automatically cutting repetitions of a pattern in a tire mold, a turntable for supporting the mold, a cutter over the turntable, rotary patterns operative jointly and intermi-ttently to reciprocate the cutter and oscillate the mold, spacing mechanism for causing relative shifting of the mold and the cutter' and means automatically operative ito actuate the spacing mecha nism only during the periods of dwell of the patterns.

3. In a machine for automatically cutting` repetitions of a pattern in 1a tire mold, a main shaft, a turntable for supporting the mold, a cutter movable over the turntable, a movable pattern for reciprocating the cutter and a. movable pattern for oscillating the mold, mechanism driven from said shaft for moving the pattern, connections from said shaft for rotating' the mold, and control devicesfor alternately moving` the patterns and I rotating the mold from the main shaft.

il. In a machine for cutting tire molds, a turntable for supporting` the mold, the turntable having two periods of operation, an os cillation and Iintermittent advance, a pattern to control the oscillation and driving mechanism for causing the advance, and a main shaft and means for connecting the main shaft with the turntable directly for the ad- Vance movement or through the pattern foil the oscillation.

5. `In a machine for cutting tire molds, a turntable for supporting the mold, the tur-nta-b'le/'havin-g two periods of operation, an

oscillation and intermittent advance, a. pattern to control the oscillation and driving mechanism for causing the advance, a main shaft and means for connecting' the main shaft with thev turntable directly for the advance movement or through the pattern for the oscillation, and areciprocating tool operable during the period of mold oscillation.

6. In a machine for cutting tire molds, a turntable for supporting the mold, the turntablehaving two periods of operation, an oscillation and intermittent advance,l a pattern to controlthe oscillation and driving mechanism for causing the advance,a main shaft and means for connecting the main shaft with the turntable 'directlyv for the advance movement or through the pattern for the oscillation, and a reciprocating tool and a. pattern therefor operable during the pe'- riod of mold oscillation.

T. ln a Vmachine for the cutting of tire molds, a turntable for supporting a mold, a reciprocating cutter over the turntable, means to reciproca-te the cutter, and means to oscillate the turntable, said means by their joint action reproducing a pattern in the mold, a shaft, means to cause intermittent rotation of the shaft in regular periods, two cams upon the shaft, connections from one of said cams to the cutter' reciprocating means and from the other cam to the turntable oscillating means, and intermittently acting means to advance the mold automatically during Vthe dwell in the rotation of the shaft, Y'

8. ln a machine for cutting tire molds, a turntable for supporting a mold, a reciprocating cutter over the turntable, means to reciprocate the cutter, and means to oscillate the turn-table, said means by their joint ac` tion reproducing a pattern in the mold, intermittently rotated patterns 4to control the movement of cutter and the oscillation of t-he turntable, and means to advance the mold operable `only during the dwell in the rotation of the patterns. y

9. In a machine for cut-ting tire molds, a turntable for `supporting a mold, a recipro cating cutter over the turntable, means to reciprocate the cutter, and means to oscillate the turntable, Vsaid means by their joint action reproducing a pattern in the mold, intermittently 'ctuated patterns to `control the movement of the cutter and the oscillationof the turntable, and means to advance the mold operable only during the dwell in the n'iovement of the patterns.

l0. ln a machine for cutting tire molds, -a turntable for supporting a mold, a reciprocating cutter over the turntable, means to reciprocate thei cutter, and means to oscillate the turntable, said means 'by their joint act-ion reproducing a pattern in the mold, intermittently actuated power operated means` to control both of said movements, and means to shift the cutter and the mold lto a new position 4during the periods ofdwell of the power means.

11. In a machinel for cutting tire molds, a turntable for supporting-'a mold, a 'reci-pra eating cutter over the turntable, means to reciprocate the cutter. and means to voscillate the turntable, said means by their joint action reproducing a pattern in the mold. a single power operated means to control both of-'said movements at .one period and to space the pattern about the mold at another period, and mechanism operating se-` lectively to alternate the actions of said power operated means.

1Q. .In a machine for cutting tireinolds, a turntable forvsupporting a mold, a reciprocating cutter over the turntable, meansto reciprocate the cutter, and means' to oscillate the turntable,said means by their joint action reproducing a pattern in the mold, a power operated means to controlV bothof said movements and to space the pattern about the mold, the spacing taking placenalternately with the cutting of the pattern and clutch mechanism in the ,power means to yeect the alternate control.

13. In a machine turntable, a pinion for driving the turn# table, a shaft carrying said pinion, separate driving'ineans for said shaft, one of said, driving means adapted to intermittently in one Adirection and the other driving means adapted to oscillate the shaft, Y and control mechanism for causing alternate action of the driving means.

V14. In a machine for cutting tire molds, a f

turntable, a pinion Afor drivingthe turntable, a shaft carrying said pinion, separate driving means for said shaft, one of said driving means adapted intermittently in. one direction and the other driving means adapted to oscillate the shaft, the said driving means acting alternately,`

and a cutter adapted to move over the mold during the operation of the second named drivingiiieans. f l

15. In a machine forv cutting tire molds, a turntable, a pinion for driving theturntable, a shaft carrying said pinion, a cam,l

means for rotating the cam intermittently, driving connections for said shaft driven by the cam, a second cam, driving connections between the second cam and the shaft, and a shiftable clutch in the connections between the second cam and the shaft.

. 16. In a machine for cutting turntable, a pinion for driving the turntable, a shaft carrying said pinion, a cam, means for rotating the cam intermittently, driving connections for said shaftdriven by the cam, a second cam, driving connections between the second cam` and the shaft, and a sliift'able clutch in the connections between the second cam and the shaft, the clutch.

being in engagement during the periods of dwell in the first named cam.

17. In a machine for cutting tire molds, a

turntable, a pinion for driving the turntable, a shaft carrying said pinion, 'a cam, means for rotating the cam intermittently, driving connection/s for said shaft driven by the cam, a second cam, driving'connections between the second cam and the shaft, a

shiftable clutch in the connectionsbetween for cutting tiie'inolds, aV

move the shaft` to move the shaft` tire molds, al

. active periods driveshaft during the active icutter'only,

movable over the mold 'while the clutch is f out of engagement.

18. In a machine` for cutting tire molds,

L4the combination of ya turntable for the. mold and a cutter movable radiallyof the mold, a shaft, apattern on the shaft to control the movement of the cutter, 'a drive shaft, means kto connect thepattern shaft to the `drive shaft iluring a portion of the revolution of the latter, a connection between the drivel shaft and the turntable, and a clutch in said connection maintainedin operative relation while the pattern shaftis disconnected.

19. In a-iiiachine for cutting tire niolds,`

the combination of a rturntable for the mold and a cutter movable over the'surface of the mold, a shafta pattern on the shaft to control tlie movement of the cutter, shaft, means to connect the pattern shaft ,to`

elution of tlie'lattei', and a connection vbe,-v

tween the Adrive shaft and the turntable op- Vthe drive shaft during a portion of the iev.- y

QO. ,Iii ainacliine forr cutting tire. molds,

the coinbinationof a turntable for thefniold, a cutter, means to obtainV active andinactive periods in the operationv of the cutter,.a sin-fr gle pattern for controlling Athe movement of the cutter during all of its active periods, a

drive shaft for the turntable, and connec- Y tions for actuating the drive shaftin one direction during the inactive yperiods of the cutter.

21.. In a machine for cutting tire molds,

the combination of a turntable for the mold, a cutter, means to obtain active and inactive periods in the operation of the cutter, a pat-y tern for controlling the movement of the cutter during its active period, a drive shaft for the turntable, and connections for ac-y tuating the drive shaft in one direction dur,-

' ing the rinactive periods of the cutter and for oscillating the drive shaft yduring the active periods of thecutter. n

22. In a machine for cutting .tire'molds, the combination of a turntablefor the mold',V a cutter,means to obtain-timed active and ina pattern for controlling the n'iovementof the cutter during its' active period, a drive shaft for the turntable, and connections operative at timed intervals for oscillating the periods of the operative clutch mechanism associated with iii the operation of the cutter,

the power shaft for rotating the cam at intervals, and a cutting tool movable over the mold'during the operation of the cam.

24. In a machine for cutting tire molds, a turntable, a drive for the turntable comprising a shaft, a gear secured to the shaft, a rack in mesh with the gear, a cam for reciprocating the rack, a second cam movable with the first said cam, means including a continuously driven power shaft and a periodically operative clutch mechanism associated with the power shaft for rotating the cams at intervals, and a. cutting tool actuated by the second cam and movable over the mold.

25. In a machine for cutting tire molds, a turntable, a drive for the turntable comprising a shaft, `means for rotating the shaft, a cam for controlling?,` said means, a second cam movable with the first said cam, means including a continuously driven power shaft and a periodically operative clutch mechanism associated with the power shaft for rotating the cams at intervals, and a cutting tool actuated by the second cam and movable over the mold.

26. In a machine for cutting tire molds, a continuously rotating shaft, a cam rotated by the shaft, a turntable, a turntable rotating shaft, a cam shaft, a clutch between the first said shaft and the cam shaft, a timing mechanism adapted to render said clutch inactive at intervals, a second clutch on the turntable shaft, means actuated by the cam y'to throw the second clutch, and means to op? erate the turntable shaft from the lcam shaft and from the cam alternately.

27. In a machine for cutting tire molds, 'a tool, means to reciprocate the tool over the 'surface of the mold and oscillate the mold during the cutting operation, and automatic means to shift the tool and the mold relatively at the end of the cutting operation so as to cause the tool to clear the mold.

28. In a machine for cutting tire molds, a tool, means to reciprocate the tool over the surface of the mold and oscillate the mold during the cutting operation, means operative in timed relation to shift the tool and the mold relatively at the end of the cutting operation so as to cause the tool to clear the mold, and means to advance the mold be` tween cutting` operations.

29'. In a machine for cutting tire molds, a tool, means to move the tool over the surface of the mold during the cutting loperation and means operating concurrently therewith for oscillating the mold, a sliding and rotating table for supporting the mold, means operative in timed relation to shift the table to cause the tool to clear the mold. and

means to rotate the table after it is shifted.

30. In a machine for cutting tire molds,l

a tool, means to move the tool over the surface of the mold during the cutting operation, a sliding carriage, a rotatable mold table on the carriage, means to shift the carriage to cause the tool to clear themold comprising a continuously rotated cam, a gear rocked by the cam and a rack on .the carriage engaged by the gear, and means for moving the table after the carriage is shifted. Y

3l. In a machine vfor cutting tire molds, a tool, means to move the tool over the su-rface of the mold during the cutting operrtion, a sliding carriage, a rotatable mold table on the carriage, means to move the carriage to cause the axis of the mold to approach or recede from the tool, means to oscillate the table while at'its` outward position, and means to advance the table while at its inward position.

32. In a machine for cutting tire molds,

a cutter' head, means to cause said cutter` head to have periods of reciprocation .and periods of rest', a rotary mold table, and means to cause said table to oseillate or advance selectively during the said periodi of reciprocation and rest, respectively.l

33. In a machine for cutting tire molds, a cutter head, means to cause said cutter head to have periods of reciprocation and periods of rest, a rotary mold table, means to cause said table to oscillate or advance selectively duringthe said .periods of recip? rocation and rest, respectively, and means to shift the tool head and the mold relatively between said periods.

34. In a machine for cutting tire molds, a cutting tool and a rotary mold table, means to cause the tool `to travel over an area of the mold in a'plurality of strokes to remove the metal in such area, and means to automatically advance the tool to the next area in the mold, the tool clearing the mold during the intervals between the said areas. Y

35. In a machine for cutting tire molds, a reciprocating tool and an oscillating mold carrier, means to cause the said elements means to 4cause the tool to travel over anV area of the mold ina plurality of strokes to remove the metal in such area, means to automatically advance the tool to the next area in the mold, and means to shift the mold and the tool before the advance oecurs so that the tool clears the mold.

37. In a machine for cutting tire molds, a reciprocating tool and an oscillating mold carrier, means to cause the said elements to move at fixed times so that the metal in` a definite area of the mold is removed, means to automatically advance the tool to the next area in the mold, and means tov shift the mold and the tool before the advance occurs so that the tool clears the mold.

38. In a machine for cutting tire molds, a tool which reciprocates radially of the mold, an oscillatory table for supporting the mold, cams for controllingrthe movements oi' the tool and the table whereby thev 40. A machinev for automatically cutting` repetitions of a pattern in work comprising a support for the work having two periods of operation, namely, an voscillation and an intermittent advance, control the oscillation and driving mecha- Anism to cause the advance, a main shaft,

a pattern tol and means for c'onnectingthe main shaftwitli the support directlyfor advance movement, or rthrough the pattern for oscillation.A

4:1. A machine fork automatically cutting' repetitions of apattern fin work comprising a supportwfor the work havin two periods of operation, namely, an oscil ation andV an intermittent'advance, a patternto controlr the oscillation and driving mechanifm to' cause the advance, a. main shaft,- means for connecting the main shaft with the support directly for advance movement,

or through the'pattern for oscillation, and

a reciprocating tool operable during the period of oscillation.

42. A machine for automaticallycutting repetitions of a pattern in work comprising.,r a support for the work having two periods of operation, namely, an oscillation and an intermittent advance, a pattern Yto control the oscillation and driving mechav nism to cause the advance, ra main shaft,

means for connecting the main shaftv with the support directly for advance movement, or through the pattern for oscillation, and

a reciprocating tool and a pattern thereforoperahle during the period of oscillation.

A. J. 'FLEITER c THEODORE A. MILLER. 

